Container



March 17, 1942. TQE. D. BILDE 2,276,711

CONTAINER Filed Deo. 3, 1940 2 Sheets-Shea?I 2 Patented Mar. 17, 1942 UN'ETED STATES CONTAINER Tord Erik Daniel Bilde, Ulvsunda, Sweden, assignor to Bolinders Fabriks Aktiebolag, Stockholm, Sweden, a corporation of Sweden application December 3, 1940, serial No. 368,403 In Sweden October 13, 1939 (Cl. S12-174) Claims.

The present invention relates to containers, and for the purpose of illustration, is shown associated with dish washing machines of the type comprising a spraying chamber adapted to be closed by a hinged lid and provided with a dishsupport movable up and down on a guide track, and in which a link mechanism connects said support with said lid in such a manner that the support is raised or lowered `as the lid is opened or shut down. In dish washing machines of the type indicated it has previously been proposed to provide a locking device which in the raised position of the support engages a xed part of the machine, such as the guide track, and thus locks the support in the said position. In this known construction, the locking device is engaged by means of a resilient spring and is disengaged by the link mechanism during the first portion of the downward movement of the lid.

It is the primary object of the invention to provide a locking device operable without any resilient means, whereb-y to obtain a more reliable operation of the locking device and a smooth and shockless movement of the dish-support so as to prevent' damaging of the dishes to be washed. Another object of the invention is to provide means permitting the support and link mechanism of being easily removed from the machine.

These and other objects are attained by `mechanism described below with reference to the accompanying drawings in whichl Fig. 1 is a section of the spraying chamber of a dish washing machine, showing the support, locking device, and link mechanism in elevation;

Fig. 2 is a similar View showing the parts during the movement of the lid;

Fig. 3 is a side view on an enlarged scale of the connection between the support and the link mechanism; and

Fig. 4 is a front elevation of the parts shown in Fig. 3.

With reference to the drawings, numeral ill designates a scullery sink which in known manner is covered by sheet metal I2 preferably consisting of stainless material. Provided in the surface of the sink is a substantially rectangular opening I4 into the border of which there is cut a shoulder l5 on which is suspended a sheet metal container I8 resting with its edge on a packing 20. The container I8 can be closed by means of a lid 22 connected with the container by means of a hinge 2d so that the rlid in its closed position will be on a level with the surface ofthe sink. The container I8 forms the spraying chamber 26 of the dish washing machine and includes the mechanical equipment thereof, which forms no part of this invention and may be constructed and arranged in any suitable manner, for instance, as shown and described in the copending patent application of Morner, Serial No. 211,012, filed May 31, 1938.

The support for the dishes or for a dish-carrying basket or tray is in the form of a frame 3] slidable up and down along two guide tracks 32 suitably secured to opposite walls of the `container I8. The frame 3l) is connected with'the lid 22 by means of angular links lill, one link being disposed on either side of the frame 3l?. Since the guide, lock, and link mechanisms `are identical on both sides of the frame 0r support 3d, only one of these mechanisms will be described hereinafter. Each of the angular links 34 is provided, at its upper end, with a pin 3d engaging a slot 33 in a lug @il which is secured to the lower side of the lid. The connection between the angular links Bil and the support Se is constructed in the following manner.

The lower end of each angular link 34 is provided with a pin 42 mounted in a locking arm M. A slidable shoe 4S being substantially U- shaped in cross-section and adapted to slide on the guide track 32 is pivoted to the locking arm 44 by means of a pin it and is provided with two horizontal lateral arms 593 to which the support 30 is secured as by screws 52. The upper portion of the arm M is in the form of a projection or stop member 5d directed toward the track 32 (Fig. 3). In one end position, the locking arm .44 abuts against a stop 55 on one of the lateral arms 50 (Fig. 4) and is then located parallel to the shoe 48, the stop member 5t being then disposed just above the upper end of the track 32. In its other end position, the locking arm @d is laterally swung out about the pivot l5 and abuts against a stop 58 on the other one of the lateral arms 50 (Fig. 2), the stop member 5d then being located laterally of the track 32. l

The mode of operation of the mechanism described so far is as follows.

During the upward movement of the lid 22 the shoe 48 connected to the frame or support 30 will slide along the track 32 and be moved upwardly parallel to itself, the pin 35 on the upper yend of the angular link 31E sliding in the slot 38 of the lug 4) (see Fig. 2). During the upwardmovement, the inclined position of the locking arm Ml is maintained by the stop member bil sliding on the left hand face of the track 32, as viewed in Fig. 2. If at the end of the upward movement of the lid 22 the support Eil reaches its upper end position, the stop member 5ft comes out of Contact with the lateral face of the track 32. The last portion of the upward movement causes the angular link 34 to turn the locking arm 4d in a clockwise direction about the pivot 46 from the position shown in Fig. 2 into the position shown in Fig. 1, in which the stop member 54 will abut against the upper face of the track 32 (see Fig. 3) thereby locking the support 30 in its upper end position. When the lid is shut down, the first portion of the downward movement causes the angular link 34 to turn the locking arm 44 in an anti-clockwise direction into engagement with the stop 58 so that the shoe 48 can freely slide down along the track 32.

As will be seen from the drawings, the locking arm 44 locks the support 30 against downward movement only and permits free upward movement. The track 32 and sliding shoe 48 are devised in such a manner that upon further upward movement from the normal upper end position the support 30 will be disengaged from the track 32.

The pin 38 is provided with an enlarged oblong head 60 which normally prevents the angular link 34 from being disengaged from the slot 38. In order to render possible removal of the angular link 34 from the lug 4D, for instance in order to remove the support 38 from the container or dish washing machine, the slot 38 is shaped in such a manner with regard to the shape of the head 68 that the pin 3B upon deliberate further relative movement between the lid 22 and the angular link 34 can be disengaged from the lug 40. To this end. in the embodiment shown, the upper portion 62 of the slot 38 is disposed parallel to the vlongitudinal direction of the head 68 so that upon further upward movement of the support and angular link 34 from the position shown in Fig. 1 the head 68 can be withdrawn through the slot.

The interengaging faces 64 and 66 of the stop member 54 and the track 32, respectively, are advantageously parallel to each other and inclined in a manner such that a plane 68 at right angles to the said faces cuts the pivot 46 of the locking arm 44 (see Fig. 3). If the said abutting faces would be horizontal the locking arm 44 would be liable to be jammed as a result of the moment about the pivot 46 and the turning movement of the locking arm would be checked due to increased friction.

It will be understood that the scope of the invention is not limited to the constructional details described with reference to the preferred embodiment thereof.

What I claim is:

l. A container of the class described having an opening at the top thereof, a hinged lid arranged to close said opening, a movable article support within said container, a guide track on the inside of said container for guiding said support in vertical direction, a locking device connected to said support and movable therewith for locking said support in normal upper end position against downward movement, and link mechanism pivotally connected to said lid and to said locking device, said link mechanism being constructed and arranged to raise and lower said support upon opening and closing movement of said lid and to positively engage and disengage said locking device.

2. A container of the class described having an opening at the top thereof, a hinged lid arranged to close said opening, a movable article support within said container, a guide track on the inside of said container for guiding said support in vertical direction, a sliding member secured to said support and arranged to engage said track, a locking arm for said support, a pivot for mounting said locking arm on said sliding member, a stop member forming part of said locking arm and being arranged to engage the upper end of said track whereby to prevent downward movement of said support, and link mechanism pivotally connected to said lid and to said locking arm, said link mechanism being constructed and arranged to raise and lower said support upon opening and closing movement of said lid and to positively engage and disengage said locking dev1ce.

3. A container of the class described having an opening at the top thereof, a hinged lid arranged to close said opening, a movable article support within said container, a guide track on the inside of said container for guiding said support in vertical direction, a sliding member secured to said support and arranged to engage said track, a locking arm for said support, a pivot for mounting said locking arm on saidvsliding-member, a stop member forming part of said locking arm and being arranged to engage the upper end of said track whereby to prevent downward movement of said support, and link mechanism pivotally connected to said lid and to said locking arm, said link mechanism being constructed and arranged to raise and lower said support upon opening and closing movement of said lid and to positively engage and disengage said locking device, the interengaging faces of said stop member and said track being, in the normal upper end position of said support, parallel to each other and so located that a plane at right angles to said faces cuts said pivot.

4. A container of the class described having an opening at the top thereof, a hinged lid arranged to close said opening, a movable article support within said container, a guide track on the inside of said container for guiding said support in vertical direction, a locking device connected to said support and movable therewith for locking said support in normal upper position against downward movement, link mechanism pivotally connected to said locking device, and a pin and slot connection for connecting said link mechanism to said lid, said slot being shaped so as to prevent said pin and slot connection from being disengaged during normal relative movements between said lid and said link mechanism and to permit disengagement of said pin and slot connection upon deliberate additional relative movement between said lid and said link mechanism. 5. A container of the class described having an opening at the top thereof, a hinged lid arranged to close said opening, a movable article support within said container, a guide track on the inside of said container for guiding said support in vertical direction, a locking device connected to said support and movable therewith for locking said support in normal upper position against downward movement, link mechanism pivotally connected to said locking device, and a pin and slot connection for connecting said link mechanism to said lid, said pin having an oblong head adapted to prevent said pin and slot connection from being disengaged during normal relative movements between said lid and said link mechanism, a portion of said slot being parallel to the longitudinal direction of said oblong head in the upper end position of said lid, whereby to vpermit said pin of being withdrawn through said slot upon lifting said support and said link mechanism from the normal upper end position.

TORD ERIK DANIEL BILDE. 

